Simultaneous independent control system for electric motors
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United States of America Patent
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-
Jul 27, 1982
Grant Date -
N/A
app pub date -
Jul 3, 1980
filing date -
Jul 3, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected frequencies superimposed on a DC track voltage on a common power line servicing the motors. The modulation is variable and determines the speed of the motors. Transmitters are portable and designed removably to plug into a common signal transmission cable anywhere along its length without interaction. Receivers, each tuned to a specific frequency and associated with and controlling a motor, are coupled to the common power line.
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